Does hydrogen bonds increase viscosity?

Viscosity is governed by the strength of intermolecular forces and especially by the shapes of the molecules of a liquid. Liquids whose molecules are polar or can form hydrogen bonds are usually more viscous than similar nonpolar substances.

How does hydrogen bonding affect on the viscosity of a liquid?

Due to an increase in the size and mass of the molecule, the molecules of the liquid experience greater resistance. As a result, viscosity of a liquid increases. Therefore, the liquids with extensive hydrogen bonding show higher viscosity.

What happens when hydrogen bonds are weakened?

First, the lower surface tension means that the paper can’t sit atop the water’s surface, allowing more of the water to come in contact with more of the paper. Second, the weakened hydrogen bonds mean that the water is more likely to soak into the porous paper, making the paper much more dense and causing it to sink.

How does hydrogen bonding affect the boiling point and viscosity of a liquid?

Molecules with hydrogen bonds will always have higher boiling points than similarly sized molecules which don’t have an an -O-H or an -N-H group. The hydrogen bonding makes the molecules “stickier,” such that more heat (energy) is required to separate them.

How does intermolecular forces affect viscosity?

Intermolecular forces present in a liquid is a factor which affects its viscosity. Higher the intermolecular forces, higher will be the viscosity. When there is a strong intermolecular force, the molecules of the liquids are strongly bonded to each other. This induces a resistance to move.

Does hydrogen bonding decrease viscosity?

As hydrogen bonds form and break during the motion of water molecules, the dynamics of the hydrogen bonding dominates the intermolecular forces and influences shear viscosity.

Why are hydrogen bonds the weakest?

Hydrogen bonds are weaker than covalent bonds because hydrogen bonds do not involve a formal electron exchange. The formal electron exchange strengthens the bond. In comparison, hydrogen bonds are weaker than covalent and ionic bonds but stronger than most Van der Waals forces.

Why hydrogen bonds are the weakest bond?

Because the hydrogen is slightly positive, it will be attracted to neighboring negative charges. When this happens, a weak interaction occurs between the δ+ of the hydrogen from one molecule and the δ– charge on the more electronegative atoms of another molecule, usually oxygen or nitrogen, or within the same molecule.

How does hydrogen bonding affect the boiling point of water?

Hydrogen Bonding and Boiling Point The greater the attractions, more energy is needed and hence higher will be the boiling point. In water because of the hydrogen bonding attraction between molecules greater energy is needed to separate them from against their inter molecular attraction, therefore higher boiling point.

Are hydrogen bonds weak?

Individual hydrogen bonds are weak and easily broken; however, they occur in very large numbers in water and in organic polymers, creating a major force in combination. Hydrogen bonds are also responsible for zipping together the DNA double helix.

Do weak intermolecular forces have high viscosity?

a) The weaker the intermolecular forces in a liquid, the higher the viscosity. b) The stronger the intermolecular forces in a liquid, the lower the viscosity.

Would the compound with the most hydrogen bonding possibilities have a low or high viscosity?

Those with the most hydrogen bonding willhave a high viscosity. 2)In general, you can say that as the size of the molecule increases the dispersion forces will increase.

Why does hydrogen bonding increase the viscosity of water?

Hydrogen bonding is strong, and it occurs between things that are capable of hydrogen bonding, like -OH groups on water or alcohols. It increases viscosity by creating these strong forces between every molecule in the liquid. It’s also the reason why water has such a high heat capacity.

Why do thicker liquids tend to have a higher viscocity?

Thicker liquids tend to have a higher viscocity. Let’s take honey as an example. The bonds in honey are hydrogen and oxygen form hydrogen bonding, which are one of the strongest bonds, and this causes strong cohesion forces between them and it causes the flow of honey to be slow/viscous.

Why is the flow of honey slow/viscous?

1 Answer. Let’s take honey as an example. The bonds in honey are hydrogen and oxygen form hydrogen bonding, which are one of the strongest bonds, and this causes strong cohesion forces between them and it causes the flow of honey to be slow/viscous. Cohesion is the attraction in a molecule of liquid to each other due to intermolecular forces.

What type of bonding is present in honey?

Let’s take honey as an example. The bonds in honey are hydrogen and oxygen form hydrogen bonding, which are one of the strongest bonds, and this causes strong cohesion forces between them and it causes the flow of honey to be slow/viscous. Cohesion is the attraction in a molecule of liquid to each other due to intermolecular forces. Answer link.